<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Basic declarative popover example</title>
  </head>
  <body>
    <button popovertarget="mypopover" popovertargetaction="show">
      Show popover
    </button>
    <button popovertarget="mypopover" popovertargetaction="hide">
      Hide popover
    </button>
    <div id="mypopover" popover>Popover content</div>
  </body>
</html>
